Improvement in stone pavements



UNITED STATES PATENT QEEIcEo BENJAMIN F. CAMP, OF PHILADELPHIA,PENNSYLVANIA.

IMPROVEMENT IN STONE PAVEMEN'TS.

Specification forming part of Letters Patent No. 189,337, dated April10, 1877; application filed March 11, 1876.

To all whom it may concern:

Be it known that I, BENJAMIN F. CAMP, of Philadelphia, in-the county ofPhiladelphia and State of Pennsylvania, have invented certain new anduseful Improvements in Pavements, of which the following is aspecification:

My invention relates Vto certain new and useful improvements instreet-pavements, its object being to so construct the pavement that theblocks will be firmly bound together and held in place in such positionas to prevent the wheel-tires of vehicles passing over the pavement fromentering` the joints between the blocks, for the purpose of preventingrutting, and which will form a perfect water-shed for rain, and beimpervious to liquids or filth,

tional view of my improved pavement, and

Fig. 2 a plan view of the same.

In the drawing, the letter A represents the pavement, constructed ofrectangular blocks of granite or other hard stone, laid obliquely ordiagonally across the road-bed, which is previously prepared for theirreception by rolling, at any angle to the curbing, varying from a rightangle to an angle of forty-five degrees. The pavement is arched, asshown, to form a water-shed for rain, and the interstices between thejoints of the stones are filled with asphalt or other elasticwater-proof cement.

The stones, after being laid, are firmly pressed into the road-bed bymeans of a heavy steam-roller, either before or after the cement hasbeen filled in between the same, the cement being reduced to a liquidstate and poured vinto the interstices; or a semi-plastic cement may beused, formed by combining the asphalt with other materials, and pressedlor forced into the interstices at the same time and by the operation ofrolling.

In the pavement as thus constructed, the stones are firmly compactedtogether by the operation of rolling, and, being laid obliquely acrossthe street, the joints are presented at an angle to the wheels ofvehicles passing along the pavement, thus preventing the entrance of thewheels, and the consequent ruttin g common to pavements as ordinarilylaid. Besides, the cement between the joints prevents the passage ofwater and filth through the interstices, the pavement forming animpervious water-shed, which'will not be injured by frost, the whole, byreason of the elastic nature of the cement between the joints, forming acomparatively noiseless roadway.

What I claim, and desire to secure by Letters Patent, is

A stone pavement composed of rectangular blocks laid obliquely acrossthe road-bed, combined with au asphalt filling between the stones, asand for the object specified.

In testimony that I claim the foregoing I have hereunto set my hand inthe presence of the subscribing witnesses.

B. F. CAMP.

Witnesses: l

Jos. L. GooMBs, A. H. NoEEIs.

